[DNX#2006040142000704] [U-Boot-Users] Re: [PATCH] Make System IO Config R [...]
DENX Support System
support at denx.de
Sat Apr 1 00:20:30 CEST 2006
Hello list,
inside the automatic U-Boot patch tracking system a new ticket
[DNX#2006040142000704] was created:
<snip>
> Wolfgang.
>
> That is very convincing. So for the special case of setting RCW to boot
>
> from lowmem vector, all is well. And I guess there is no great harm in
> that restriction.
>
> When RCW set to boot from himem vector though, the 83xx maps in the
> _last_ 8M of the flash chip, not the first, so the remap_flash_by_law*
> routines end up mapping u-boot out from under us. But OK; we just won't
>
> do that then.
>
> I still stand by by compaint though: if you're going to remap flash
> according to CFG_FLASH_BASE in start.S, then the 8M hardcoded size is
> annoying.
>
> >>back to LAW0 on a builtin assumption of 8M size, placing the starting
> >>address thereof to the CFG_FLASH_BASE location (in their case,
> >>0xfe00_0000); then do jumping arithmetic based on that value and TEXT_BASE.
> >>
> >>Which works in the Freescale-ADS case, as they have an 8M flash chip.
> >
> >
> > It also works in case of the TQM8349 board, which uses 32 MB:
> >
> > U-Boot 1.1.4 (Nov 17 2005 - 00:14:36) MPC83XX
> >
> > Clock configuration:
> > Coherent System Bus: 266 MHz
> > Core: 533 MHz
> > Local Bus: 33 MHz
> > CPU: MPC83xx, Rev: 1.1 at 533.328 MHz
> > Board: TQM834x
> > PCI1: 32 bit, 33 MHz
> > I2C: ready
> > DTT: 1 is 28 C
> > DRAM: 256 MB
> > FLASH: 32 MB
> > PCI: Bus Dev VenId DevId Class Int
> > In: serial
> > Out: serial
> > Err: serial
> > Net: TSEC0, TSEC1
> >
> > Type "run flash_nfs" to mount root filesystem over NFS
> >
> > Hit any key to stop autoboot: 0
> > => fli
> >
> > Bank # 1: CFI conformant FLASH (32 x 16) Size: 32 MB in 256 Sectors
> > Erase timeout 16384 ms, write timeout 0 ms, buffer write timeout 4096 ms, buffer size 32
> > Sector Start Addresses:
> > 80000000 (RO) 80020000 (RO) 80040000 (RO) 80060000 80080000
> > 800A0000 800C0000 800E0000 80100000 80120000
> > 80140000 80160000 80180000 801A0000 801C0000
> > ...
> >
> > Best regards,
> >
> > Wolfgang Denk
> >
</snip>
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